Among trivial question asked by people on Islamic banking is why Islamic bank refer money market rate for charging profit in their financing. While such a rate is a bid-and-offer combination of interest (hence, riba) such a practice will strengthen the image of Islamic bank as being mirror of conventional bank. People keep saying that Islamic bank is just conventional bank under a new robe. The Islamic bank practitioner provide a simple answer for that. "We do not have a alternative reference for the rate."